/*设置背景*/
body {
  background-image: url("img/5.jpg");
  background-repeat: no-repeat;
  background-size:100%;
}
/*设置登录框*/
.form-signin {
  max-width: 420px;
  padding: 20px 30px;
  margin: 320px auto;
  background-color: #9fcdff;
  background-color:rgba(255, 255, 255, 0.3);
  border-radius: 6px;
}
.form-signin .form-signin-heading,
.form-signin .checkbox {
  margin-bottom: 10px;
}
.form-signin .checkbox {
  font-weight: 400;
}
.form-signin .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 10px;
  font-size: 16px;
}
.form-signin .form-control:focus {
  z-index: 2;
}
.form-signin input[type="email"] {
  margin-bottom: -1px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}
.form-signin input[type="password"] {
  margin-bottom: 10px;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
